BackgroundSince K-r and K-5 have been marketed, many Pentax users have been complaining about the obvious Front Focus (FF) issue resulted when using these cameras, when they were shooting at lower light and more so under tungsten light source, actually. A recent report here.In fact, this "Yellow Light FF Symptom" was with Pentax users for long since Pentax made their first DSLR, the *ist D. But I
